Machine for preparing stay-strips.



G. H. CROWELL.

MACHINE FOR PREPARING STAY STRIPS.

APPLICATION FILED PERA, 1913,

Patented Dec'. 16, 1913.

2 SHEETS-SHEET l.

H IIIIIHH' HHIIIIII C. H. GROWELL.

-MAGHINE FOR PREPARING STAY STRIPS.

APPLIGATION FILED PERA, 1913.

Patented Dec. 16, 1.913.

2 SHEETS-SHEET 2.

Umm' a. UWE-LI', 0F 'SWAMPSGOTI MASSACH'USETTS.

een ennemies-sommaire specification-ot Letterslatent. .applicationmaremma; ma. A:serial no. masa atented Dec. .16, "1913.

,To :ail whomc't may concern:

iBe known :that I, lC1L.mn1:. nzis 1H.' Gnownm.,

a lcitizen :of the United States, residing at ,Swampscota county ofEssex, `State of.I

Massachusetts, have invented a certain -new and useful Improvement inMachines for' :Preparing Stay-Strips, -of which the follow- 'King is aspecification, reference .-bemg had therein to the accompanyingdrawings.

My invention relates to machines. for forming a fold longitudinally 'ofa :coil of `madhine.

The machine forming fthe subject matter@ xof my invention isparticularly intended tof `:produce a stay strip of the Anovel form.

shown and described invan application for; `Letters vPatent ofthe UnitedStates ufiledjby:4 une .January 27, 19.13, Serial No. 744,308.

The peculiar feature :of the said stay strip is that awhile lit is bentor folded along the `.median line it is not scored or indented, and `isnot weakened, -at the bending line, butretains its initial strengthwhile .the same time' it will feed true in -a corner staylng machine andall resiliency having been re-I moved :along 'said Aline of lfo'ld,it'will :lie fiat on the sides of the box to vwhich is applied. 'Themachine lembodying the present invention produces this novel stay stripat a .minimum of expense l:so that the stay strip costs no more thanmarked Aor indented stay strip.

Accordingly my present invention has for its object 'a machine which'will 'take a rol-l 'of dat stay strip (either gummed or ungummed)unwind the stay strip from the roll, form a fold in it as described,press the strip along the line 'of fold, iiatten 1t out again and rewindit, performing all the operations simultaneously and as rapidly as it ispossible to unwind and rewind the paper. In the machineembodying myinvention the stay strip` is unwound from a coil, it then passes' overor between' a suitable folding die or dies which operate to fold. thestay strip upon itself along the medianline. The stay strip then passesbetween a pair of Aferent widths of stay strip.

pressing 4rolls which operate to press the stay strip 'es cially .at the`-fold, breaking downfany sti ess ofz'the materialAalong-'said lfme'and.removing its resiliency. Thereafter the stay stri-p passes over favsuitable guide roll which opens and fattens the 4folded strip so thatit may be re-wound in its flattened condition ready s'for use in acorner staying machine.

The invention will `.be 'fully understood from :the followingdescription taken in con- -neotion with the accompanying drawings,

the novel features thereofbeing pointed out and cleanlydeined in theclaims at the close of the specification. v

l.In the drawings, Figure 1 is a side 'elevation of the machineembodying my invention. Fig. 2 is a section of the same taken :on line 22 of Fig. 1 :look-ing in the ldirec- -tion of the arrows. rFig. 3 is aItop plan view ofthe mao'hine shown in Fig. 1. .Fig 4 is an enlarged'section on 1line 4-4 Fig. l1., of one of the folding dies. Fig. 5 anenlarged section -on :line 5--5 Fig. 1 of vthe folding dies, thissection being taken at a v,point near the :end where the stay strip.emerges from the fold-ing dies. Fig. 6 is fa plan View showing famodification hereinafter described.

.Referring `now to the drawings, there :is

shown at A a suitable frame for the Imachine. Above this frame andadjustably supported thereon l`is Va table B, upon which the rolls ofpaper are supported. The table B is adjustable vertically by means ofscrews 1.1, 11, operated by the hand wheel 12 to adjust the machine foroperation upon dif- At `C is shown the roll of stay strip which is beingunwound, 'and at D the roll which ,is being rewound, the stay stripbetween the two rolls being indicated by the letter E. As is well knownyto those familiar with lthis art the stay strip is woundon a center ofwood, such as is indicated at F and G. The roll-C., which is beingunwound, is -placed on a spindle 13, and a ca 14 secured by a set screwl5 is pressed own on the wooden center F causing the small projections16 on the under side of the cap 14 to engage the wooden center F. Itwill thus be seen that the shaft 13 will be caused torotate when :thestay strip E is pulled off the roll C.

In order that the stay strip E may have als `the proper tension afriction device or brake is plated on the shaft 13. This consists of asmall brake wheel 17 secured to the shaft 13 and having its surface infrictional contact with a brake shoe 50 mounted on a flat .spring 51secured by a screw or simllar device as at to a downward projection 61from the table B. The spring. 51 applies suflicient friction to thebrake wheel so that the shaft 13 canno-tspin and so that a sultableresistance will be offered to the unwinding of the stay strip from theroll.

The stay strip is unwound from the roll C by being wound onto the rollD. The roll Dis mounted on a shaft 20 at the other end of the machineand is caused to rotate with said shaft by a cap 21 similar to thecorrespondingparts of the unwinding lshaft 13. The re-winding shaft 20is driven by a belt and pulley or equivalent device. As shown bevelgears 23 and 24. The belt passes over` the main driving pulley 27 and isdriven by it. The belt 25 is preferably tightened by a tightening pulley28 adjustable on a screw threaded rod 29, which is conveniently 0peratedby a hand wheel 30.

After leaving the unwinding roll C the stay strip E passesv around anidler 33 and thenA passes through a gradually converging folding die 34,the two sides of which'are substantially equal in width to one-half ofthe width of the stay strip. As the stay strip passes through theconverging die it is gradually bent into a V-shape and then as itproceeds is folded upon itself so that its halves are substantiallyparallel with each other. As will be seen from Fig. 5 the end of thepassage in the folding die at which the stay strip emerges issubstantially parallel sided and slightly more than twice the thicknessof the stay strip to befolded so that the strip may readily pass throughit. To keep the stay strip inposition in the die 34 I provide a hingedmember 601 which contacts with the edge of the stay strip and holds itin the groove in the die.

When the stay strip emerges from the die, folded upon itself along itsmedian line, it passes between a pair of pressing rolls 37 and 38 whichiron or compress the strip especially along the line of fold, fracturingand breaking up, any sizing, adhesive or other stiff material along saidline, and removing all resiliencytherefrom. The fibers of the cloth orpaper of which the strip is formed are not however torn or broken by`the folding or pressing operations so that the strength of the strip isnot impaired. After pressing thestrip is unfolded and flattened out andrewound in a coil ready for use. By this device a stay strip is producedthe two halves of which have a limp hinged connection with theresiliency destroyed at the drawings, a belt and pulley 25 and 26 drivesthe re-winding shaft 20 through the `bite of the the Ifolding line andwhen therefore the strip is laid on abox corner it has no tendency tolift `ofl' before the adhesive sets as would be the case if theresiliency at the line of fold was not destroyed.

In order to provide for adjustment of the top roll 37 I rovide squareslidablel boxes 80 underf w ich shims 81- may be placed. The boxes 80are held down on the shims'by a spiral spring. After leaving thepressure rolls 37 and 38 the folded stay strip 1s opened so that it liesHat and is guided over the idler 39 to the re-winding mechanism. As thestay strip is subjected to some tension when it passes over theidler'39, it is substantially flattened out so that it may be rewoundwithout difficulty.

The pressure rolls 37 and 38 are driven I.

at a surface speed equal to the linear speed of the stay strip by meansof a pair of gears 40 and 41 on the main shaft 42 and the` top roll 37is driven from the bottom roll 38 by means of two gears 43 and 44, seeFig. 2. As it is desirable that the machine should be capable of foldingstay strips of various widths I make provision for its adjustment.

for this purpose by raising or lowering the table B.v When'it-is desiredto fold a wider stay strip .the table is lowered a distance equal toone-half'the increased width of the stay strip,l and adie for a strip ofthe desired width is inserted. The position of the changed.

The driving pulley to which power is ap- 'plied from a convenient sourceis shown at 65, Fig. 2, mounted on the main driving shaft, and a clutchand shipper device operated lby the Vfoot treadle 66, and of well knownconstruction as will be clear from said Fig. 2 is provided for thestopping and starting of the machine.

At Fig. 6 I have shown a modification of i my machine in which twofolding dies and two sets of pressing rolls are employed. After passingthrough the die shown at 70 and the pressing rolls 71 it is unfolded andpasses the idler roll 72 then through another die 73 which folds it uponitself, but in the reverse direction from the first fold, then betweenanother set of pressing rolls 74,

pressurer0lls'37 and 38 is notA then past an idler 75 where it isflattened Y out preparatory to being rewound into a coil ready for use.The object of this double folding in reverse directions and doublepressing is to provide for stay strip which may be made from very stiffor heavy or intractable material and which may require a double foldingto remove all resiliencyv at the line of fold. A number of foldings andpressings may be employed without injury to any stay strip but usuallyone folding and pressmg will be suilicient to produce a stay stripwhich' will feed evenly in a corner stay machlne and which will not haveresiliency leef4 in combination with a spindle to receive a enough leftin the line of fold to cause it to lift off the box corner whenmoistened and pressed against the latter.

What I claim is:

1. In -a machine of the character described,

roll of stay strip, a folding die, pressing rolls, rewinding mechanism,and means for adjusting said folding die and rewinding mechanism withrelation to said pressing rolls for various widths of stay strip.

2. In a machine of the character described, the combination with a tablehaving thereon a spindle to receive a roll of stay stri a foldin die andrewinding mechamsm o; in-

depen ently supported pressing rolls, and

means for adjusting said table with relation to said pressing rolls fordiferent widths of stay strlp.

3. In a machine of the character described, the combination with avertically adjustable table carrying a spindle for a roll of stay strlp, guide rolls and a rewindin mechamsm for said stay strip, of a dieaving a passage therethrough with gradually converging sides andpressing rolls adjacent the mouth of said die, said die and said rollsbein mounted on the frame of the machine inbzpendently of the verticallyadjustable ta e.

n In testimony whereof I aiix my signature, 1n presence of twowitnesses.

CHARLES H. CROWELL.

Witnesses:

WILLIAM A. MACLEOD, Amor: H. MORRISON.

